Marino Ballena National Park, Costa Rica

The Whale's Tail at Punta Uvita is the headline — a kilometer-long sandbar that emerges at low tide in a near-perfect humpback-tail shape. Walk to the tip when the tide drops, then photograph it from above (the Cerro Chimán lookout) or by drone for the famous overhead shot. Time it with a tide chart or you'll just be wading.

Humpback whales pass through twice a year — the northern-hemisphere stock from roughly December to March and the southern-hemisphere stock from July to October, peaking August–September with mother-and-calf pairs. It's one of the only places on earth where both populations visit, and boat tours from town have an extremely high success rate in season.

The park is divided into four beach sectors all reached off the coastal highway — Playa Hermosa, Playa Uvita (Whale's Tail), Playa Ballena, and Playa Piñuelas. One entry ticket covers all four for the day, so it's worth hopping between them. Piñuelas has the prettiest cove, Ballena the quietest sand, Hermosa the longest stretch for walking.

In Uvita town, The Bohío and La Fogata (wood-fired pizza) are reliable sit-down dinners, and Indomito Brewing is the local craft beer hangout with bar food. The Whale Tail Brewery on the highway is a casual stop for Latin-American fusion plates and house beers after a beach day.

Up in the Uvita hills above town, Kura Design Villas and Oxygen Jungle Villas run sunset restaurants worth booking even if you're not staying — both have huge Pacific views and serve dinner to non-guests by reservation.

The Saturday morning farmers' market in Uvita is the best on the southern Pacific coast — organic produce, artisan bread, live music, and a good lunch crowd. For tours, Bahía Aventuras runs small-group whale-watching and snorkeling trips and is one of the longest-established operators in town.

Walk the Whale's Tail only on a falling or low tide — the sandbar floods on the rising tide and people get caught having to wade back through deep, current-pulled water. Check the tide chart at the entrance, and turn around well before the tide turns. Don't bring valuables you can't carry the whole way.

Outside the protected swimming zones, rip currents are strong along Playa Hermosa and Playa Uvita. Stick to areas with other swimmers. Petty theft from unattended beach bags and parked cars is the other recurring issue — never leave anything visible in a rental car at the entrance lots.

Four official entrances sit off Route 34 (the coastal highway) — Uvita (Playa Hermosa and the Whale's Tail), Colonia, Ballena, and Piñuelas. A single ticket is good all day across every sector, so park-hopping by car is the easy way to see the whole park. Hotels in the Uvita hills are essentially car-required.

Whale-watching boat tours all launch from the main Uvita beach inside the park — most include the park entry fee, snorkeling at Isla Ballena or Isla Tres Hermanas, and 3–4 hours on the water. Book through a local operator like Bahía Aventuras and time your trip to coincide with whale season for the best return on the morning.

For the southern-hemisphere humpbacks with mothers and calves, target mid-July through October with peak sightings in August and September — this overlaps the Festival de Ballenas y Delfines held in Uvita in September, when the town fills with tour boats and visitors. You'll get rain, but the whale action is the most reliable in the country.

For dry weather plus the northern-hemisphere humpbacks, aim for late December through March. Sightings are good (though typically fewer than the southern peak), the sandbar is exposed more reliably on calm tides, and the inland trails and waterfall day-trips around Uvita are actually walkable.